为什么 sed 使用国际字符失败以及如何修复? [英] Why does sed fail with International characters and how to fix?

问题描述

GNU sed version 4.1.5 似乎无法使用国际字符.这是我的输入文件:

GNU sed version 4.1.5 seems to fail with International chars. Here is my input file:

Gras Och Stenar Trad - From Moja to Minneapolis DVD [G2007DVD] 7812 | X
<br>
Gras Och Stenar Trad - From Möja to Minneapolis DVD [G2007DVD] 7812 | Y

(注意第二行的元音变音.)

(Note the umlaut in the second line.)

当我这样做时

sed 's/.*| //' < in

我希望只看到 X 和 Y，因为我已经要求删除 '|' 之前的所有字符和超越它的空间.相反，我得到:

I would expect to see only the X and Y, as I've asked to remove ALL chars up to the '|' and space beyond it. Instead, I get:

X<br>
Gras Och Stenar Trad - From M? Y

我知道我可以使用 tr 删除国际字符.首先，有没有办法只使用 sed?

I know I can use tr to remove the International chars. first, but is there a way to just use sed?

推荐答案

我认为如果文件的输入编码与您环境的首选编码不同，就会发生错误.

I think the error occurs if the input encoding of the file is different from the preferred encoding of your environment.

示例:in 是 UTF-8

Example: in is UTF-8

$ LANG=de_DE.UTF-8 sed 's/.*| //' < in
X
Y
$ LANG=de_DE.iso88591 sed 's/.*| //' < in
X 
Y

UTF-8 可以安全地解释为 ISO-8859-1，你会得到奇怪的字符，但除此之外一切都很好.

UTF-8 can safely be interpreted as ISO-8859-1, you'll get strange characters but apart from that everything is fine.

示例:in 是 ISO-8859-1

Example: in is ISO-8859-1

$ LANG=de_DE.UTF-8 sed 's/.*| //' < in
X
Gras Och Stenar Trad - From MöY
$ LANG=de_DE.iso88591 sed 's/.*| //' < in
X 
Y

ISO-8859-1 无法解释为 UTF-8，解码输入文件失败.奇怪的匹配可能是由于 sed 尝试恢复而不是完全失败.

ISO-8859-1 cannot be interpreted as UTF-8, decoding the input file fails. The strange match is probably due to the fact that sed tries to recover rather than fail completely.

答案基于 Debian Lenny/Sid 和 sed 4.1.5.

The answer is based on Debian Lenny/Sid and sed 4.1.5.

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